Pump.



UNITED STATES Patented October 27, 1903.

PATENT OFFICE.

-PUMP.

SPECIFICATION r g pa of Letters Patent 742,471, dated October 27, 1903.

Application filed August 29 1902.

To all whom it may concern:

Be it known that we, GEORGE MORRIOE and CHARLES GRIM, citizens of theUnited States, residing at Sonora, county of Timlumne, State ofCalifornia, have invented an Improvement in Pumps; and we hereby declarethe following to be a full, clear, and exact description of the same.

Our invention relates to improvements in pumps of the double actingtype, in which a reciprocating plunger is adapted to draw wateralternately into valve-controlled passages connecting with thepump-barrel above and below the plunger and to discharge the water in acontinuous stream. Its object is to provide a pump of this charactersuitable particularly for deep mining operations, which shall be simplein construction and which is readily convertible into a single-actingpump, thereby allowing repairs or renewals to be made without suspendingthe operation of the pump.

It comprises the parts and the construction and combination of partshereinafter described, and set forth in the claims, and illustrated inthe accompanying drawing, which represents the pump and connections.

A represents a pump barrel or cylinder in which the plunger 2 isreciprocable The lower end of the barrel communicates with thesuction-pipe 3 and is provided with a removable casing &, having asuitable stopvalve 5. The plunger-rod 6 is slidable in a stuffing-box7'in the opposite end of the barrel. Water is drawn in on alternatereciprocation through valve 5 and discharged on successive reciprocationthrough stop valve 8 into the main discharge-pipe 9. Aby-passlO connectsthe suction-pipe just below valve 5 with the opposite end of thecylinder. WVater is drawn in on alternate reciprocations of the pistonthrough this bypass and is discharged through the pipe-section 11 intothe main discharge-pipe 9. Respective valves 12 13 in the by-pass andsection 11 hold the water against serial No. 121,474. (No model.)

back pressure. Stop-cocks 14 15 are disposed above the respectivedischarge-valves 8 and 13, While the cooks 16 17 are disposed below therespective intake-valves 5 and 12.

In operation With all the cooks open the plunger draws water alternatelyinto each end of the cylinder, first acting to close one set of valves12 8 and to open the other set 5 13 and then to close the latter and toopen the former, thus sending a continuous stream to the surface throughthe discharge-pipe 9.

By closing cocks 14: 16 the pump is converted into a single-acting pumpand the water is drawn in through stop-valve 12 and thence forcedoutward through valve 18. By opening cocks lat 16 and closing cocks 1517 ,thepump will act similarly on the opposite side.

A salient feature of this pump is the fact that by disposing the cookson the opposite sides of the intake and discharge valves any of thevalves can be repaired or replaced at any time without stopping thepump. This is of greater importance in deep mining, where largequantities of water have to be handled.

With our apparatus either pump-column may operate independently of theother or both may act in conjunction, as desired.

18 19 are blow-ofi cocks, one or the other of which may be opened whenthe pump is single-acting.

Compared with single acting pumps of equal capacity this pump requirespractically but half the power of those pumps to operate it, or, inother Words, with the same power it will pump double the amount ofwater.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is-

An improved deep-mining pump consisting of a vertically-disposedcylinder; a plunger reciprocable therein; a suction-pipe connecting withthe lower end of the cylinder and provided with a removable casinghaving a stop-valve; a valved main discharge-pipe vertically disposed atone side of the cylinder In witness whereof We have hereunto set andhaving a lateral connection with the lower our hands.

portion thereof; a valved by-pass Vertically- GEORGE MORRICE. disposedat the opposite side of the cylinder CHARLES G. GRIM.

5 having one end connecting with the suctionpipe and the opposite endconnecting with g g fi$ Molnce S Slbnatme' the upper end of thecylinder; a vertical pipe- MORRIS section between and parallel with thecylinder and main discharge-pipe; and valve con- Witnesses for CharlesG. Grim:

1o nections between said section and the cylin- JAMES ATCHESON,

der and discharge-pipe. EDWARD TUNNAGE.

